Mechanical Engineering Toolkit vs EngCalc

Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results — with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material • Moments of inertia of plane areas • Force-displacement relation of a bar • Torsion formula and angle of twist • Flexure formula of a beam • Transverse shear stress • Deflections and slopes of cantilever and simple beams • Plane stress transformation and Mohr's circle • Principal stresses and planes • Spherical shell and thin-walled pressure vessel stresses • Buckling load of a column • Thermal deformation and stress • Combined loading • Bolted / riveted joints • Fatigue safety factor • Shaft power and torque Statics • Centroid of an area • Resultant of a force system • Beam reactions • 2D truss analysis Machine Design • Helical compression springs • Spur gear geometry and stresses • Shaft fatigue design (DE-Goodman) • Bearing L10 life • Belt and chain drives • Bolt preload / torque-tension • Fillet weld strength • Press / shrink-fit interference • Shaft critical speed (Dunkerley) • Beam natural frequency (five end conditions) • Torsional natural frequency (one or two rotors) Fluids & Thermal • Reynolds number and flow regime • Pipe pressure drop (Darcy-Weisbach with Colebrook) • Pump and fan power • Composite wall conduction • Fin efficiency • Heat exchanger sizing by LMTD Theory of Elasticity • Constitutive relation of linear elastic material • Stress/strain of linear elastic material Composite Material • Lamina and laminate stress/strain • Lamina engineering constants • Laminate plane and 3D properties • Rule of mixtures • Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables • Drill & tap chart (metric and imperial thread series) • ISO 286 fits & tolerances • Standard sections (AISC W, IPE, HEB) • Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.

An engineering calculator that does not stop at basic arithmetic. EngCalc opens with a familiar, fast calculator - and behind it, fifteen professional modules for when the work gets serious. CAMERA SOLVER Photograph a formula from paper or a textbook. The app recognises it, shows it in editable form and evaluates it. Recognition runs on your device, offline - the image goes nowhere. MECHANICAL - Gears - ratio, output speed and torque, pitch, tip, root and base circle, centre distance - Machine elements - bolt torque, bearings, shafts - Thermal expansion and ISO 286 fits - Hydraulics - cylinder force and speed ELECTRICAL - Ohm's law from any two values - Series and parallel resistor networks, four-band colour code - Cable and voltage drop - DC, single and three phase, copper or aluminium - RC/RL filters, ADC - Bus timing - Modbus RS485, Profinet, EtherCAT MATHEMATICS - Equations - linear, quadratic with complex roots, 2x2 systems - Vectors and matrices - dot and cross product, determinant, inverse - Function plots and a rotatable 3D surface - Save your own formulas with variables ALSO - Unit converter across eight categories - Material database - metals, plastics, composites - Available in English, Hungarian and German PRIVACY No account, no ads, no analytics, no tracking. All your data stays on your phone. Calculations are indicative. For precise engineering always rely on the relevant standard and the manufacturer's datasheet.